The Texas Instruments LM137QML-SP is a 3-terminal negative voltage regulators suitable for harsh environments, precision current regulation, on-card regulation and programmable voltage regulation.

The regulators require only 1 output capacitor for frequency compensation and 2 external resistors to set the output voltage.

LM137 series features thermal shutdown, internal current limiting and safe-area compensation as blowout-proof against overloads.

LM137 are complementary to the LM117 adjustable positive regulators


  • Multipurpose Power Supply
  • On-card Voltage Regulation
  • Programmable Voltage Supply
  • Precision Current Supply
  • Harsh Environments

Orderable Part Numbers

Key features

  • SMD 5962-99517
  • Available TID Qualified to 30 krad(Si)
  • Output Voltage Adjustable from −37 V to −1.2 V
  • 1.5A Output Current Specified, −55°C to +150°C
  • Line Regulation Typically 0.01%/V
  • Load Regulation Typically 0.3%
  • Excellent Thermal Regulation, 0.002%/W
  • 77 dB Ripple Rejection
  • Excellent Rejection of Thermal Transients
  • 50 ppm/°C Temperature Coefficient
  • Temperature-independent Current Limit
  • Internal Thermal Overload Protection
  • Standard 3-lead Transistor Package
  • Output is Short Circuit Protected

Testing & qualification

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Last updated: 2021-12-21


Radiation-hardness-assured (RHA), -4.2-V to -40-V, 1.5-A adjustable negative linear regulator



input voltage
-40 to -4.2 V
output voltage
-37 to -1.2 V
output current
< 1.5 A
operating temperature
-55 to 125 C
RoHS compliance
export control


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